is proper is morally right, and what is morally right
is proper. The nature of the difference between
morality and propriety can be more easily felt than
expressed. For whatever propriety may be, it is
manifested only when there is pre-existing moral
rectitude. And so, not only in this division of moral
rectitude which we have now to discuss but also in
the three preceding divisions, it is clearly brought out
what propriety is. For to employ reason and speech1
rationally, to do with careful consideration whatever one does, and in everything to discern the
truth and to uphold it—that is proper. To be
mistaken, on the other hand, to miss the truth,
to fall into error, to be led astray—that is as
improper as to be deranged and lose one's mind.
And all things just are proper; all things unjust,
like all things immoral, are improper.
The relation of propriety to fortitude is similar.
What is done in a manly and courageous spirit seems
becoming to a man and proper; what is done in a
contrary fashion is at once immoral and improper.